Car-truck



(No Mode.)

' S. A. vBEMISl GAR TRUCK.

No. 373,578.: Patented Nov. 22, 1887.

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35 bars of suitable dimensions.

UNITED STATES PATENT OFFICE.

SUMNER A. BEMIS, OF SPRINGFIELD, MASSACHUSETTS.

CAR-TRUCK.

SPECIFICATION :forming part of Letters Patent No. 373,578, datedNovember 22, 1887.

(No model.)

Io ject being toprovide an improved axlebox and spring-frame forcar-trucks; and the invention consists in the peculiar construction andarrangement ofsaid spring-frame and supporting devices, all ashereinafter fully de scribed, and pointed out in the claim.

In the drawings forming part of this specication, Figure l is a sideelevation' of a carwheel, the axle-box on the journal thereof, and ofaportion of the truck-frame having applied thereto a jaw, bearingsprings,and connect-ions between said jaw, the axle-box, and said frameembodying my improvements. Fig. 2 is a plan view ofthe jaw, a portion ofthe truck-frame, and the axle-box. Fig. 3 is an end elevation of thejaw. Figs. 4 and 5 illustrate detail parts, hereinafter fully described.

In the drawings, 2 indicates the upper horizontal bar of the side frameof a carvtruck, and

3o 5 the lower bar of said frame, having one end projecting in aninclined direction up and secured to the extreme end of said bar 2,thereby forming a brace for said frame, the latter being constructed, inthe usual manner, ofiron The metallic axle-boX jaw 8, having the pendingends c, between which the axle-box 9 is supported, is bolted by thebolts 4 to the under side of said framebar 2. Each end of said jaw S isprovided with alateral extension, b, through which said bolts 4 pass,and the axle-box 9 is provided with the laterally-extending springsteps6, which in practice occupy a position directly under the said lateralextensions b,

and are perforated, as shown by dotted lines in Fig. l Under each ofsaidextensions b of the jaw 8 is placed a hollow' iron post, 3, the lowerend of which bears upon the lower bar, 5, ofthe truck-frame, said postpassing loosely 5o through the springstep 6 of the axle box, and

a coil-spring, 7, is interposed between said extension of the jaw andsaid spring-step, as clearly shown in Fig. l, and said bolt 4. passesthrough the bar 2 of the frame, the extension i l t b of the jaw, thehollow post 3, and the lower bar, 5, of the frame, and is secured in thelatter by nuts on its lower end, as shown, whereby the jaw and thehollow post 3 are rigidly secured within the side frame of the truck,the springs 7 receiving the weight of the truck and the car, their lowerends bearing upon the steps 6, and so transmitting the weight of theload to the axle-box and thence to the journal, the end of which isshown in dotted lines in Fig. l. The upper edge ofthe jaw 8 has alongitudinal groove, a, (see Fig. 3,) in its upper edge, in which thebar 2 of the frame lies when the parts are bolted together, as shown inFig. 1. The hollow posts 3 pass through openings in the spring-steps 6on each side ot' the axle-box, which are of greater diameter than theposts themselves, as indicated by the dotted lines on said steps,wherebythe vertical movement which is given to said posts as thetruck-frame moves up and down under a load is not to any degreeobstructed by fric tional contact with the steps, and the parts areallowed a certain degree of lateral motion, which obviates any strain orcramping between the axle-box and the pending ends c of the jaw.

The abovedescribed manner of arranging the axle box having thespringsteps thereon in connection with the jaw and said hollow postsrigidly attached to the truck-frame, together with the bearing springs7, interposed between the laterally-extending portions of t-he jaw andthe steps 6 on the axle-box, provide a frame-eonstruction for theaxlebox and the springs of the car which conduces to an excessively easyvertical motion of the car, and at the same time one that is simple anddurable.

What I claim as my invention is- Thejaw 8, secured to the truck-frame,and having the lateral extensions b, combined with the axle box havingthe perforated laterallyextending spring-steps 6, the hollow' postssecured between said jaw-extensions and said frame and passing throughsaid steps, the bearing springs interposed between said jawextensionsand steps, and the bolts 4, substantially as set forth.

SUMNER A. BEMIS.

Vitnesses:

G. M. CHAMBEELAIN, H. A. GHAPIN.

IOO

